When the computer is not display and what can you do for it?

Answer 1

First be sure that the problem is the monitor and not the computer. Connect a monitor that you know works to test this.

Here I am talking about CRT monitors -- the kind that look like old TV sets, NOT flat screen monitors. It is a little known fact that monitors have a built-in fuse. To get at it you have to open the case. WARNING: even when the monitor is unplugged it can give you a dangerous electric shock! The most dangerous part is the back end of the picture tube. BE SAFE: unplug the monitor and let it sit for a couple of days before opening the case! Put the monitor face down on a padded surface like a couch, or use a folded blanket on your workbench. Just behind the plastic that surrounds the screen you will find a number of screws, usually four, one in each corner. Undo the screws and then very gently lift the back of the case straight off. Now you have to find the fuse. The most commonly used fuse is a small glass tube with metal ends. They are about the diameter of a drinking straw and about 1 inch long. It will be held by clips at each end. Locations vary, but they are most commonly at the back of the monitor and lower than the picture tube. There are other kinds of fuses, and some are even soldered in, but you need help to find them. Carefully remove the fuse and take it to an electronics store to buy an exact replacement. The information you need is stamped onto one of the metal ends. Replace the fuse securely, re-attach the back of the case, and you are ready to go